The nutritional research you speak of is not clear-cut. Experts with a lot more knowledge and experience than any of us here are not yet certain about the many factors that contribute to heart disease. There are lots of conflicting studies, gray areas, and aspects of heart disease development that are still very "cloudy." Thats why there are panels of experts within professional associations and government agencies who regular review the latest research and produce guidelines and recommendations. Chaos would ensue if there was not an organized effort to pull all the data together and produce prudent guidelines for society. Yes, those guidelines need to be updated when new information becomes available -- but chaos would ensue if each health care provider were making recommendations on the last few things he/she had read.
As a newbie with limited knowledge and experience in these matters it is best for you to talk with the experts in your environment and ask them about the things that you have read. In the process of talking with your local experts, you may be pointing out a few resources they have been previoiusly unaware of -- and they may do the same with you. They will take any new information you share with them, evaluate it, and incorporate it into their recommendations as appropriate -- and you will gain the benefit of hearing their expert assessment of that information. In other words, you can both learn something from the exchange of information.
That's the way things move foreward.